Converter In-Rush Thermistors etc, UPDATE -4
UPDATE on 17 Nov, Update 2 on 22 Nov, Update 3 on 16 Jan 14, Update 4 on 19 Oct 14. --------------- In a recent thread there was mention of how you can wreck your gizmo (in my case a converter) ...
Forum Discussion
DryCamper11 wrote:
.............. You then plug in the assumed inrush current into a formula for minimum R.
Choosing an R above the minimum is OK. Below the minimum, you risk failure at turn on.
DryCamper11 was going from vague memory there (18 Nov), but now I can tell what he was talking about, wrt those two lesson plans, etc.
This relates to my current puzzle over the meaning of "minimum."
He and Ken seem to contradict the lesson plans where with 5.7 calculated they went with a 5 and with 1.2 calculated, they went with a 1. Ken says with 3.4 to go higher and use the 5.
I found in an earlier post that in series, the two 2Rs would be 4R, so that is answered (which is above 3.4 if that comes into play)
Getting this "minimum" definition clarified would tell me whether, with a 3.4 calculation I should use a 4 or 5 or whether I could use a 2. ( If going with Ken's low size amps where that 3.4 came from)
Can anybody help with that definition of "minimum" business? Thanks.
